This source file includes following definitions.
- fsl_dcu_drm_is_volatile_reg
- fsl_dcu_irq_uninstall
- fsl_dcu_load
- fsl_dcu_unload
- fsl_dcu_drm_irq
- fsl_dcu_drm_pm_suspend
- fsl_dcu_drm_pm_resume
- fsl_dcu_drm_probe
- fsl_dcu_drm_remove
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8 #include <linux/clk.h>
9 #include <linux/clk-provider.h>
10 #include <linux/console.h>
11 #include <linux/io.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/mm.h>
14 #include <linux/module.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/regmap.h>
20
21 #include <drm/drm_atomic_helper.h>
22 #include <drm/drm_drv.h>
23 #include <drm/drm_fb_cma_helper.h>
24 #include <drm/drm_fb_helper.h>
25 #include <drm/drm_gem_cma_helper.h>
26 #include <drm/drm_irq.h>
27 #include <drm/drm_modeset_helper.h>
28 #include <drm/drm_probe_helper.h>
29 #include <drm/drm_vblank.h>
30
31 #include "fsl_dcu_drm_crtc.h"
32 #include "fsl_dcu_drm_drv.h"
33 #include "fsl_tcon.h"
34
35 static int legacyfb_depth = 24;
36 module_param(legacyfb_depth, int, 0444);
37
38 static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
39 {
40 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
41 return true;
42
43 return false;
44 }
45
46 static const struct regmap_config fsl_dcu_regmap_config = {
47 .reg_bits = 32,
48 .reg_stride = 4,
49 .val_bits = 32,
50
51 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
52 };
53
54 static void fsl_dcu_irq_uninstall(struct drm_device *dev)
55 {
56 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
57
58 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
59 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
60 }
61
62 static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
63 {
64 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
65 int ret;
66
67 ret = fsl_dcu_drm_modeset_init(fsl_dev);
68 if (ret < 0) {
69 dev_err(dev->dev, "failed to initialize mode setting\n");
70 return ret;
71 }
72
73 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
74 if (ret < 0) {
75 dev_err(dev->dev, "failed to initialize vblank\n");
76 goto done;
77 }
78
79 ret = drm_irq_install(dev, fsl_dev->irq);
80 if (ret < 0) {
81 dev_err(dev->dev, "failed to install IRQ handler\n");
82 goto done;
83 }
84
85 if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
86 legacyfb_depth != 32) {
87 dev_warn(dev->dev,
88 "Invalid legacyfb_depth. Defaulting to 24bpp\n");
89 legacyfb_depth = 24;
90 }
91
92 return 0;
93 done:
94 drm_kms_helper_poll_fini(dev);
95
96 drm_mode_config_cleanup(dev);
97 drm_irq_uninstall(dev);
98 dev->dev_private = NULL;
99
100 return ret;
101 }
102
103 static void fsl_dcu_unload(struct drm_device *dev)
104 {
105 drm_atomic_helper_shutdown(dev);
106 drm_kms_helper_poll_fini(dev);
107
108 drm_mode_config_cleanup(dev);
109 drm_irq_uninstall(dev);
110
111 dev->dev_private = NULL;
112 }
113
114 static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
115 {
116 struct drm_device *dev = arg;
117 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
118 unsigned int int_status;
119 int ret;
120
121 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
122 if (ret) {
123 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
124 return IRQ_NONE;
125 }
126
127 if (int_status & DCU_INT_STATUS_VBLANK)
128 drm_handle_vblank(dev, 0);
129
130 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
131
132 return IRQ_HANDLED;
133 }
134
135 DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
136
137 static struct drm_driver fsl_dcu_drm_driver = {
138 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
139 .load = fsl_dcu_load,
140 .unload = fsl_dcu_unload,
141 .irq_handler = fsl_dcu_drm_irq,
142 .irq_preinstall = fsl_dcu_irq_uninstall,
143 .irq_uninstall = fsl_dcu_irq_uninstall,
144 .gem_free_object_unlocked = drm_gem_cma_free_object,
145 .gem_vm_ops = &drm_gem_cma_vm_ops,
146 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
147 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
148 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
149 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
150 .gem_prime_vmap = drm_gem_cma_prime_vmap,
151 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
152 .gem_prime_mmap = drm_gem_cma_prime_mmap,
153 .dumb_create = drm_gem_cma_dumb_create,
154 .fops = &fsl_dcu_drm_fops,
155 .name = "fsl-dcu-drm",
156 .desc = "Freescale DCU DRM",
157 .date = "20160425",
158 .major = 1,
159 .minor = 1,
160 };
161
162 #ifdef CONFIG_PM_SLEEP
163 static int fsl_dcu_drm_pm_suspend(struct device *dev)
164 {
165 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
166 int ret;
167
168 if (!fsl_dev)
169 return 0;
170
171 disable_irq(fsl_dev->irq);
172
173 ret = drm_mode_config_helper_suspend(fsl_dev->drm);
174 if (ret) {
175 enable_irq(fsl_dev->irq);
176 return ret;
177 }
178
179 clk_disable_unprepare(fsl_dev->clk);
180
181 return 0;
182 }
183
184 static int fsl_dcu_drm_pm_resume(struct device *dev)
185 {
186 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
187 int ret;
188
189 if (!fsl_dev)
190 return 0;
191
192 ret = clk_prepare_enable(fsl_dev->clk);
193 if (ret < 0) {
194 dev_err(dev, "failed to enable dcu clk\n");
195 return ret;
196 }
197
198 if (fsl_dev->tcon)
199 fsl_tcon_bypass_enable(fsl_dev->tcon);
200 fsl_dcu_drm_init_planes(fsl_dev->drm);
201 enable_irq(fsl_dev->irq);
202
203 drm_mode_config_helper_resume(fsl_dev->drm);
204
205 return 0;
206 }
207 #endif
208
209 static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
210 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
211 };
212
213 static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
214 .name = "ls1021a",
215 .total_layer = 16,
216 .max_layer = 4,
217 .layer_regs = LS1021A_LAYER_REG_NUM,
218 };
219
220 static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
221 .name = "vf610",
222 .total_layer = 64,
223 .max_layer = 6,
224 .layer_regs = VF610_LAYER_REG_NUM,
225 };
226
227 static const struct of_device_id fsl_dcu_of_match[] = {
228 {
229 .compatible = "fsl,ls1021a-dcu",
230 .data = &fsl_dcu_ls1021a_data,
231 }, {
232 .compatible = "fsl,vf610-dcu",
233 .data = &fsl_dcu_vf610_data,
234 }, {
235 },
236 };
237 MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
238
239 static int fsl_dcu_drm_probe(struct platform_device *pdev)
240 {
241 struct fsl_dcu_drm_device *fsl_dev;
242 struct drm_device *drm;
243 struct device *dev = &pdev->dev;
244 struct resource *res;
245 void __iomem *base;
246 struct drm_driver *driver = &fsl_dcu_drm_driver;
247 struct clk *pix_clk_in;
248 char pix_clk_name[32];
249 const char *pix_clk_in_name;
250 const struct of_device_id *id;
251 int ret;
252 u8 div_ratio_shift = 0;
253
254 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
255 if (!fsl_dev)
256 return -ENOMEM;
257
258 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
259 if (!id)
260 return -ENODEV;
261 fsl_dev->soc = id->data;
262
263 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
264 base = devm_ioremap_resource(dev, res);
265 if (IS_ERR(base)) {
266 ret = PTR_ERR(base);
267 return ret;
268 }
269
270 fsl_dev->irq = platform_get_irq(pdev, 0);
271 if (fsl_dev->irq < 0) {
272 dev_err(dev, "failed to get irq\n");
273 return fsl_dev->irq;
274 }
275
276 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
277 &fsl_dcu_regmap_config);
278 if (IS_ERR(fsl_dev->regmap)) {
279 dev_err(dev, "regmap init failed\n");
280 return PTR_ERR(fsl_dev->regmap);
281 }
282
283 fsl_dev->clk = devm_clk_get(dev, "dcu");
284 if (IS_ERR(fsl_dev->clk)) {
285 dev_err(dev, "failed to get dcu clock\n");
286 return PTR_ERR(fsl_dev->clk);
287 }
288 ret = clk_prepare_enable(fsl_dev->clk);
289 if (ret < 0) {
290 dev_err(dev, "failed to enable dcu clk\n");
291 return ret;
292 }
293
294 pix_clk_in = devm_clk_get(dev, "pix");
295 if (IS_ERR(pix_clk_in)) {
296
297 pix_clk_in = fsl_dev->clk;
298 }
299
300 if (of_property_read_bool(dev->of_node, "big-endian"))
301 div_ratio_shift = 24;
302
303 pix_clk_in_name = __clk_get_name(pix_clk_in);
304 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
305 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
306 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
307 div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
308 if (IS_ERR(fsl_dev->pix_clk)) {
309 dev_err(dev, "failed to register pix clk\n");
310 ret = PTR_ERR(fsl_dev->pix_clk);
311 goto disable_clk;
312 }
313
314 fsl_dev->tcon = fsl_tcon_init(dev);
315
316 drm = drm_dev_alloc(driver, dev);
317 if (IS_ERR(drm)) {
318 ret = PTR_ERR(drm);
319 goto unregister_pix_clk;
320 }
321
322 fsl_dev->dev = dev;
323 fsl_dev->drm = drm;
324 fsl_dev->np = dev->of_node;
325 drm->dev_private = fsl_dev;
326 dev_set_drvdata(dev, fsl_dev);
327
328 ret = drm_dev_register(drm, 0);
329 if (ret < 0)
330 goto put;
331
332 drm_fbdev_generic_setup(drm, legacyfb_depth);
333
334 return 0;
335
336 put:
337 drm_dev_put(drm);
338 unregister_pix_clk:
339 clk_unregister(fsl_dev->pix_clk);
340 disable_clk:
341 clk_disable_unprepare(fsl_dev->clk);
342 return ret;
343 }
344
345 static int fsl_dcu_drm_remove(struct platform_device *pdev)
346 {
347 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
348
349 drm_dev_unregister(fsl_dev->drm);
350 drm_dev_put(fsl_dev->drm);
351 clk_disable_unprepare(fsl_dev->clk);
352 clk_unregister(fsl_dev->pix_clk);
353
354 return 0;
355 }
356
357 static struct platform_driver fsl_dcu_drm_platform_driver = {
358 .probe = fsl_dcu_drm_probe,
359 .remove = fsl_dcu_drm_remove,
360 .driver = {
361 .name = "fsl-dcu",
362 .pm = &fsl_dcu_drm_pm_ops,
363 .of_match_table = fsl_dcu_of_match,
364 },
365 };
366
367 module_platform_driver(fsl_dcu_drm_platform_driver);
368
369 MODULE_DESCRIPTION("Freescale DCU DRM Driver");
370 MODULE_LICENSE("GPL");